Title

Hydrogenolysis of Glycerol Over Ni, Cu, Zn, and Zr Supported on H-Beta

Abstract

A series of transition metal oxides (e.g., Ni, Cu, Zn, and Zr) were supported on H-beta with loading of 5-20 wt% via wet impregnation. These catalysts were evaluated in the hydrogenolysis of glycerol under aqueous conditions at different reaction temperatures (150-250°C), times (5-15 h) and H₂ pressures (300-1200 psi). The results from characterization of materials by XRD, FT-IR, N₂ sorption and NH₃-TPD together with the results from the activity test allowed further understanding of the role of transition metals and acid sites on hydrogenolysis of glycerol. The H-beta was found to contain higher Brønsted acidity and catalyst activity compared to those supported metal catalysts. It was found that the acidic properties of the H-Beta zeolite and metal content play a significant role on the final product distribution. The major product over bare H-beta and Zr/H-beta was 1-proponal, while the concentration of 1,2-propanediol and 1,3-propanediol increased significantly by the incorporation of a second metal oxide. A high 1,3-propanediol selectivity of 14% was obtained over the H-beta supported Ni-Zr catalyst at 73% glycerol conversion. The selectivity of 1,2-propanediol and 1,3-propanediol were decreased at higher reaction temperature and time.

Department(s)

Chemical and Biochemical Engineering

Keywords and Phrases

Catalyst Activity; Catalyst Selectivity; Catalysts; Copper; Glycerol; Hydrogenolysis; Hydrolysis; Metals; Nickel; Precious Metals; Transition Metal Compounds; Transition Metals; Zinc; Zirconium; 1 ,2-propanediol; 1 ,3 Propanediol; Bi-Functional Catalysts; Non-Noble Metal Catalysts; Product Distributions; Reaction Temperature; Series of Transition; Supported-Metal Catalysts; Catalyst Supports; Bifunctional Catalysts; Hydrogenolysis of Glycerol

International Standard Serial Number (ISSN)

1385-8947

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Elsevier, All rights reserved.

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